From patchwork Mon Jul 3 17:52:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ahelenia_Ziemia=C5=84ska?= X-Patchwork-Id: 72023 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id C5EC3385770A for ; Mon, 3 Jul 2023 17:52:46 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C5EC3385770A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1688406766; bh=JlkE9GelpnYULlX+mgD7eX39c+FPidE1emAEpUmevOE=; h=Date:Cc:Subject:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=O5j33X1PTEId1mPDAQnP1hPjg3YqJElhN4ldpgqbVWD7TJ8amWTo+aeOThRjnnxAn 4GjWkab+YqS/R/PMcxCUlwRG1AfsFr6/dcGKG0VR93nTXdWiTn36h7+8pHS+7dx5Pt YDhk0k3JlOlmeUPWCEINp/I2CSKVcZR2AIMJs2uY= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from tarta.nabijaczleweli.xyz (unknown [139.28.40.42]) by sourceware.org (Postfix) with ESMTP id 4241C3858032 for ; Mon, 3 Jul 2023 17:52:23 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 4241C3858032 Received: from tarta.nabijaczleweli.xyz (unknown [192.168.1.250]) by tarta.nabijaczleweli.xyz (Postfix) with ESMTPSA id A6B2E2386; Mon, 3 Jul 2023 19:52:20 +0200 (CEST) Date: Mon, 3 Jul 2023 19:52:19 +0200 Cc: Carlos O'Donell , Adhemerval Zanella Netto , Paul Eggert , libc-alpha@sourceware.org Subject: [PATCH v9 1/3] posix: regcomp(): clear RE_DOT_NOT_NULL Message-ID: <56ba55edd43630bdd5658c8648c0ef3ef7d6f938.1688406716.git.nabijaczleweli@nabijaczleweli.xyz> MIME-Version: 1.0 Content-Disposition: inline User-Agent: NeoMutt/20230517 X-Spam-Status: No, score=-10.3 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_INFOUSMEBIZ, MISSING_HEADERS, PDS_RDNS_DYNAMIC_FP, RDNS_DYNAMIC, SPF_HELO_PASS, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: =?utf-8?b?0L3QsNCxIHZpYSBMaWJjLWFscGhh?= From: =?utf-8?q?Ahelenia_Ziemia=C5=84ska?= Reply-To: =?utf-8?b?0L3QsNCx?= Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" The POSIX API always stops at first NUL so there's no change for that. The BSD REG_STARTEND API, with its explicit range, can include NULs within that range, and those NULs are matched with . and [^]. Heretofor, for a string of "a\0c", glibc would match "[^q]c", but not ".c". This is both inconsistent and nonconformant to BSD REG_STARTEND. With this patch, they're identical like you'd expect, and the tst-reg-startend.c: ..c: a^@c: no match$ failure is removed. Another approach would be to remove it from _RE_SYNTAX_POSIX_COMMON, but it's unclear to me what the custody chain is like for that and what other regex APIs glibc offers that could be affected by this. Signed-off-by: Ahelenia Ziemiańska --- I hereby disclaim all copyright interest in this changeset. No-change clean rebase. posix/regcomp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/posix/regcomp.c b/posix/regcomp.c index 12650714c0..a928ef6c2d 100644 --- a/posix/regcomp.c +++ b/posix/regcomp.c @@ -462,7 +462,7 @@ regcomp (regex_t *__restrict preg, const char *__restrict pattern, int cflags) { reg_errcode_t ret; reg_syntax_t syntax = ((cflags & REG_EXTENDED) ? RE_SYNTAX_POSIX_EXTENDED - : RE_SYNTAX_POSIX_BASIC); + : RE_SYNTAX_POSIX_BASIC) & ~RE_DOT_NOT_NULL; preg->buffer = NULL; preg->allocated = 0;